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Iridium plugs


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can anyone tell me if i can set the gap on iridium plugs myself

I sent this email to NGK and they are not answering the question i asked


Hi can you confirm that if i ask a dealer for bike specific Iridium plugs

then the plug gap would be preset to the manufactures recommendations or do

i have to set the gap myself

the reason for asking is i have a Yamaha XJR1300 and orderded DPR8EIX-9

plugs which should have a gap of 0.9mm the ones i got have a lot bigger gap

than this




and recieved this reply back


Dear Sir

Thank you for your enquiry.

The spark plug gap for your vehicle is pre-set to 0.9mm. This is the

correct setting for your motorcycle.

Kind Regards.

Technical Department

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Just had a reply from NGK


Dear Sir

The plugs should be gapped at 0.9mm, I cannot explain why the plugs you

purchased were not.

But you can adjust the gap to 0.9mm for the standard and the iridium type



10/10 for speed of responce :D

i'm off in my garage now to set them :wink:

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I am a numpty

I am a numpty

I am a numpty

there i said it before you lot start on me :lol:

had the wrong feeler guages i was trying to set them to 0.09mm instead of 0.9mm


I am a numpty

I am a numpty

I am a numpty tra la la lala :oops:

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:lol: :lol: :lol:

easy done

i recon its old age Gary :P

:lol: :lol:


I could blame my mate as he passed me the guages but i wont i should have checked its definatly an age related problem :lol: :lol:

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